Is there a way to "jump start" the computer? I am not sure if I am dealing with a dead motherboard or a simple bad power button assembly. I have a Dell Dimension 4700. I powered it off normally, but now it will not power on. It did this once before, but a few hours later it started normally. This time it will not start. The power led and diagnotic leds do not light at all. The PSU seems okay. I was able to disconnect and jump the the 20-pin connector from the PSU to the mboard and start the PSU fan, and the "flea" light is on whenever the power cable is connected, however, the power led never comes on. I have gone so far as to remove everything attached to the mboard (including RAM, etc.) except the PSU but I still get nothing. Any suggestions would be greatly appreciated.